Cinematograph and the like.



H. W. JOY.

GINEMATOGRAPH AND THE LIKE. APPLICATION FILM JUNE 27, 1913. RENEWED NOV. 12, 1914.

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CINEMATOGRAPH AND THE LIKE.

Application fi led .Tune 27, 1913, Serial No. 776,167.

To all whom it may concern Be it knownthat L'HENRY WILLrAM JOY, residing at Hampton-on-Thames, Middlesex, England, have invented certain new and useful Improvements in Cinematographs and-the like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to cinematographs and the like of the kind in which the pictures in production or projection are in the form of, or are mounted on a disk.

The object of this invention is to provide an improved means for mounting such disks on the instrument. In. cinematograph apparatus of this kind it is necessary that the disk shall rotate about its true geometrical center, otherwise the pictures being produced or projected will not follow a course to coincide with the optical center of the lens of the instrument thus causing irregularities or parallax. It is, moreover, essen tial that the disk shall be capable of ready and rapid attachment and detachment to and from the instrument. in connection with which it is to be used.

According to this invention I employ a device for carrying the disk, which device is adapted to be rigidly supported from'the cineinatog raph instrument. The device is provided with a detachable member and a fixed member, "the detachable member being arranged to carry the disk and to be supported in an operable position and also to be automatically locked in its operative position by' the fixed member, th detachable member being also arrange to be re leased from the fixed member by hand pressure. Y

Referring to the drawings which show one manner of putting the invention into practice: Figure l is a side elevation of the invention. Fig. 2. is a vertical part section of Fig. 1. Fig. 3. is a side elevation of the detachable member of the device.

A support a secured to the instrument in any suitable manner, carries a bearing 5 made integral with it or otherwise rigidly secured to it. lVithin the bearing 7) is disposed a sleeve 0, provided with a flange d at its upper end and a collar 6 at its lower end. This sleeve is capable of rotating with- Specification of Letters Patent.

ment of the plates.

Patented Jan. 12, 1915.. Renewed November is, 1914. Serial no. 871,822;

movement owing to the flange d and collare. The collar 6 carries lugs f. 7 attached to which lugs, by pivots g g are jaw plates h it. Two jaw plates only are shown, but one or any number desired may be employed. The jaw plates terminate at their lowerends in lugs j j provided with holes is 70, which holes provide means for attach ing the ends of a spring Z for drawing the jaw plates toward one another. The jaw plates are provided on their inner sides with abutments m m to limit the inward move- The plates also have teeth It a out upon their inner edge, their upper sides forming a portion of the base of a triangle cut in the jaw plates, whose apex is formed by the meeting of the abutments m m.

The detachable member is composed of a round mandrel 1, provided with a knurled head 2 the head being recessed on its under side to form an annular cavity 3. The mandrel l is of a certain diameter for a portion of its length nearest the head, when it is stepped down to a smaller diameter, leaving a chamfered shoulder a. The lower end of the mandrel l is tapered as at 5 and then swells out into a truncated cone 6. The mandrel, 1 has a hole passing longitudinally through its center. The hole is of two diameters, the larger diameter 7 continuing for more than half the length of the man drel and then merging abruptly into a hole 8 of lesser diameter. Within the hole 7 is disposed a push rod 9 terminating in a knob 10 at its upper end, while its lower end has a screwed hole 11 bored in it longitudinally, the length of the rod being somewhat less than the length of the hole '1'. Screwed into the hole 11 in the push rod 9 is an extension 12 provided with a coned head 13; this extension 12 fits easily into the hole 8 and has its coned head protruding into the coned space formed by the jaw plates j j. The base of the coned head 13 rests upon the truncated cone 6, and so forms a coin plete cone which partially fills the coned space formed by the jaw plates. Disposed upon the extension 12 is a spiral spring 14.; this spring is located in the hole 7, so that its lower end rests upon the shoulder formed in the hole 8, while its upper end supports the push rod 9. Slidably mounted instrument as shown at Fig.

upon the larger diameter of the mandrel 1 is a flange 15 provided with a boss 16 a spiral spring 17 being arranged around the boss 16 normally to press the flange 15 against the flange 01.

In considering the operation of the invention let it be assumed that the detachable member has been removed from the fixed member and that it is desired to place a disk 18 in position in the cinematograph 1. The disk 18 is slipped over the end of the mandrel 1 of the detachable member and is moved up the same until the enlarged diameter of the part 1 its in the hole in the disk, and the face of the disk is again'stthe flange 15. It is essential that the enlarged portion of the mandrel 1 should closely lit into the hole in the disk, otherwise the disk would not run truly when driven. The loose member is next inserted in the sleeve 0 and pressed downward, so that the jaw plates 72, h are forced apart by the cone 13. As the loose member is further pressed downward the teeth a a close behind the base of the trun cated cone 6. When the two members are thus relatively positionedthe disk 18 will be firmly held between the flanges cl and 15 owing to the pressure exerted by the spring 17 on the flange 15. When the disk is rotated the whole device will also rotate, with the exception of the bearing 6. The jaw plates 7 h are prevented from flying outward owing to centrifugal force when the disk 15 rotated by the tension of the spring Z drawing the plates together.

-When it is desired to remove the disk 18 the knob 10 is pressed inward thus forcing downward the push rod 9, extension 12 and cone head 13 against the pressure of the spring 14. As the cone 13 descends it impinges upon the abutments mm, of the aw plates j j and. so forces the jaw plates apart, thus removing the teeth a a from beneath the base of the cone 6. The loose member may then be withdrawn by means of the head 2, the pressure on the knob 10 being released after the base of the c one 6 has passed between the teeth '27, a. The enlarged portion of the mandrel 1 should pass for a short distance into the sleeve 0, so as to insure the disk riding properly on the enlarged portion of the mandrel.

ll claim 1. A device for carrying cinematograph disks, comprising a stationary hearing; a sleeve journalcd in said bearing and having a clamping member at one end, a removable pin slidable in the sleeve and provided with means for holding it in place, and a springpressed clam ping member slidable on the said pin and adapted to clamp the picture disk against the aforesaid clamping member.

2. A. device for carrying cinematograph disks, comprising a stationary bear? g, a

sleeve journaled in the said bearing and having a clamping member at one end, a removable pin slidable in the sleeve and provided with an enlarged portion which pro jects from the sleeve and which fits the hole in the picture disk, means for holding the" pin in place, and a spring-pressed clamping member slidable on the enlarged portion of the pin and adapted to clamp the picture disk against the aforesaid clamping member.

3. A device for carrying cinematograph. disks, comprising a fixed 'fneinber supported from the machine; a detachable disk carrying member adapted to be retained in operable position by cated cone disposed at one end of said detachable member; jaw plates operably secured to said fixed member and arranged to engage the base of said truncated cone, and means for disengaging said detachable member from said fixed member.

t. A device for carrying cinematograph disks comprising a fixed bearing supported from the machine, a rotatable sleeve provided with a flange carried by said bearing; pivoted jaw plates carried by said sleeve; a detashable disk carrying member adapted to be retained in operable position by said fixed member; a truncated cone disposed at one end of said detachable member for engaging with said jaw plates and means for disengaging said detachable member from said fixed member.

5. A device for carrying cinematograph disks comprising a fixed bearing supported from the machine; a rotatable sleeve carried by said bearing; a flange integral with said sleeve; a collar provided with lugs secured to the opposite end of said sleeve to said flange; jaw plates pivoted to. said lugs; a spring normally drawing said jaw plates toward one another; a detachable disk carry ing member; a truncated cone adapted to engage with said jaw plates to retain said detachable member in operable position within said sleeve, and means fordisengaging said detachable member from said fixed member. I

6. A device for carrying cinematograph disks comprising a bearing supported from the machine; a rotatable sleeve within said bearing; jaw plates carried by said sleeve; a mandrel adapted to fit in said sleeve; a truncated cone adapted to engage with said draw plates; a cavity passing longitudinally through said mandrel; a spring pressed push rod disposed within said mandrel; an extension connected to said push rod and terminating in a cone for releasing said truncated cone from said jaw platest 7. A device for carrying cinematogra'ph disks comprising a fixed bearing supported from the machine; a rotatable sleeve within said bearing; a flange on said sleeve; jaw plates pivotally connected to said sleeve; e

mandrel adapted to fit in said sleeve; a head ing apart said jaw plates to release said 10 to said mandrel; a slidable flange on said mandrel.

mandrel; a spring adapted to press said In testimony whereof I have affixed my slidable flange toward the flange on said signature, in presence of two Witnesses.

sleeve; a cavity passing longitudinally through said mandrel; a spring pressed HENR1 VILLIAM push rod disposed Within said mandrel; an Witnesses:

extension connected to said push rod, and a O. J. WORTH,

cone on the end of said push rod for press- L. E. Bowm. 

